php 常用函数

/*以post的方式，请求url $data为数组参数 */
function post($url, $data){
        $postdata = http_build_query($data);       
        $opts = array('http' =>
                      array(
                          'method'  => 'POST',
                          'header'  => 'Content-type: application/x-www-form-urlencoded',
                          'content' => $postdata
                      )
        );
       
        $context = stream_context_create($opts);
        $result = file_get_contents($url, false, $context);
        return $result;
    }
    /*把字符串url参数转换为数组*/
    function convertUrlQuery($query)
    {            
        $queryParts = explode('&', $query);
        $params = array();
        foreach ($queryParts as $param)
        {
            $item = explode('=', $param);
            $params[$item[0]] = $item[1];    
        }        
        return $params;
    }